Sarcomatoid urothelial carcinoma of the urethra with an unusual right ventricular metastasis: a case report and review of literature
7 affiliations
- 1Medical Oncology Department, Vall d’Hebron University Hospital
- 2Cardio-Oncology Unit, Cardiology Department, Vall d’Hebron University Hospital
- 3Pathology Department, Vall d’Hebron University Hospital
- 4Genitourinary, Central Nervous System and Sarcoma Group, Vall d’Hebron Institute of Oncology
- 5Radiation Oncology Department, Vall d’Hebron University Hospital
- 6Nuclear Medicine Department, Vall d’Hebron University Hospital
- 7Radiology Department, Vall d’Hebron University Hospital
Abstract
Primary urethral carcinoma is an uncommon malignancy, and cardiac metastasis represents a rare event (~4% of cases) that poses significant diagnostic challenges, particularly in distinguishing myocardial tumors from intracavitary thrombi. Here we report a 54-year-old male diagnosed with cT4N0M0 sarcomatoid urothelial carcinoma of the bulbar urethra. Following neoadjuvant dose-dense MVAC and radical surgery (ypT2N0, PD-L1 TPS 20%), adjuvant nivolumab was initiated. Six months after surgery, he developed locoregional recurrence and an expanding right ventricular mass. Multimodality cardiac imaging—including contrast echocardiography, FDG PET-CT, cardiac CT, and cardiac MRI—demonstrated a solid myocardial lesion with intracavitary extension and adjacent myocardial infiltration, considered highly suspicious for cardiac metastasis in the context of concurrent extracardiac progression. Histological confirmation was not obtained because of the procedural risk associated with extensive right ventricular involvement. Treatment with enfortumab vedotin yielded relative stability of the cardiac and pulmonary metastases; however, relentless locoregional progression occurred, illustrating interlesional response heterogeneity. The patient subsequently received palliative radiotherapy, and best supportive care before passing away 17 months after initial diagnosis. This case underscores the vital role of multimodal imaging in the differential diagnosis of cardiac masses in oncological patients with concurrent thromboembolic risk and its interpretation in conjunction with the disease course when pathology confirmation cannot be obtained. Furthermore, it highlights the therapeutic complexity and dismal prognosis associated with sarcomatoid histology in advanced urethral carcinoma.
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BibTeX
@article{yaringano2026sarcomatoid,
title = {{Sarcomatoid urothelial carcinoma of the urethra with an unusual right ventricular metastasis: a case report and review of literature}},
author = {Jesús Yaringaño and Javier Calvo-Losada and Gerard Oristrell and María E. Semidey and David Marmolejo and Abrham André Geng-Cahuayme and Marc Simó and Richard Mast and Cristina Suárez and Joan Carles and Rafael Morales-Barrera},
journal = {Frontiers in Oncology},
year = {2026},
month = oct,
doi = {10.3389/fonc.2026.2003381},
url = {https://www.frontiersin.org/articles/10.3389/fonc.2026.2003381/full},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Sarcomatoid urothelial carcinoma of the urethra with an unusual right ventricular metastasis: a case report and review of literature
AU - Jesús Yaringaño
AU - Javier Calvo-Losada
AU - Gerard Oristrell
AU - María E. Semidey
AU - David Marmolejo
AU - Abrham André Geng-Cahuayme
AU - Marc Simó
AU - Richard Mast
AU - Cristina Suárez
AU - Joan Carles
AU - Rafael Morales-Barrera
PY - 2026
DA - 2026/10/21
JO - Frontiers in Oncology
DO - 10.3389/fonc.2026.2003381
UR - https://www.frontiersin.org/articles/10.3389/fonc.2026.2003381/full
AB - Primary urethral carcinoma is an uncommon malignancy, and cardiac metastasis represents a rare event (~4% of cases) that poses significant diagnostic challenges, particularly in distinguishing myocardial tumors from intracavitary thrombi. Here we report a 54-year-old male diagnosed with cT4N0M0 sarcomatoid urothelial carcinoma of the bulbar urethra. Following neoadjuvant dose-dense MVAC and radical surgery (ypT2N0, PD-L1 TPS 20%), adjuvant nivolumab was initiated. Six months after surgery, he developed locoregional recurrence and an expanding right ventricular mass. Multimodality cardiac imaging—including contrast echocardiography, FDG PET-CT, cardiac CT, and cardiac MRI—demonstrated a solid myocardial lesion with intracavitary extension and adjacent myocardial infiltration, considered highly suspicious for cardiac metastasis in the context of concurrent extracardiac progression. Histological confirmation was not obtained because of the procedural risk associated with extensive right ventricular involvement. Treatment with enfortumab vedotin yielded relative stability of the cardiac and pulmonary metastases; however, relentless locoregional progression occurred, illustrating interlesional response heterogeneity. The patient subsequently received palliative radiotherapy, and best supportive care before passing away 17 months after initial diagnosis. This case underscores the vital role of multimodal imaging in the differential diagnosis of cardiac masses in oncological patients with concurrent thromboembolic risk and its interpretation in conjunction with the disease course when pathology confirmation cannot be obtained. Furthermore, it highlights the therapeutic complexity and dismal prognosis associated with sarcomatoid histology in advanced urethral carcinoma.
SN - 2234-943X
ER -